I've also got the 4-in-1 bucket. I've used that a great deal as well. I bought mine with the teeth but ended up taking them off (for now) since I haven't needed them yet. Actually, aside from the rear wheels on the mower deck and throwing a tooth on the mini-hoe, I don't know that I have any real complaints about the attachments I have.
I've used the 4-in-1 for grabbing piles of small stuff (larger stuff gets the utility grapple), clearing an area at the cabin by ripping small trees out of the ground, moving big rocks, etc. The jaws of the bucket have some very aggressive teeth on them so if you clamp down, whatever you are grabbing normally stays put. The front/rear edges of the bucket as well as the dozer piece have got a blade on them and are pretty sharp.
I've got the forks, mini-hoe w/ thumb, utility grapple, light material bucket, 60" mower, post hole digger, trailer hitch, 4-in-1, spring rake, power rake, 60" snow blade w/ the rubber scraper. Maybe some things I'm not thinking of right at the moment, so if you want any details on any of them, I'd be glad to help where I can.